SIT8208AC-32-18E-31.250000T

Frequency Stability:	±25ppm
Current - Supply (Disable) (Max):	30mA
Height - Seated (Max):	0.032" (0.80mm)
Size / Dimension:	0.197" L x 0.126" W (5.00mm x 3.20mm)
Package / Case:	4-SMD, No Lead
Mounting Type:	Surface Mount
Ratings:	--
Current - Supply (Max):	31mA
Operating Temperature:	-20°C ~ 70°C
Absolute Pull Range (APR):	--
Series:	SiT8208
Voltage - Supply:	1.8V
Output:	LVCMOS, LVTTL
Function:	Enable/Disable
Frequency:	31.25MHz
Type:	XO (Standard)
Base Resonator:	MEMS
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Oscillators

Oscillators are devices that generate an electronic signal, usually a sinusoidal wave, which can be used in a variety of applications. One such application is SIT8208AC-32-18E-31.250000T, a voltage-controlled crystal oscillator (VCXO). The VCXO uses a crystal and a control voltage to generate a precise frequency output. In this article, we will discuss the application field and working principle of the SIT8208AC-32-18E-31.250000T.

Application Field

The SIT8208AC-32-18E-31.250000T can be used in several different types of applications. One of its primary uses is in telecommunications, where reliable and stable frequency control is needed. The VCXO is well-suited for this type of application as it can be adjusted to any desired frequency within a given range with a fine level of accuracy. It can also be used in medical equipment where precise timing and frequency control are paramount, such as in heart monitors or anaesthetic ventilators. Furthermore, its wide frequency range and low power consumption make it ideal for portable applications, such as in wireless Bluetooth devices such as mobile phones and music player headphones. It can also be used to regulate the frequency of various types of battery-powered devices, such as clocks and watches.

Working Principle

The SIT8208AC-32-18E-31.250000T is a voltage-controlled crystal oscillator (VCXO), which means its frequency is determined by the applied control voltage. The VCXO is based on a parallel-resonant crystal vibrator circuit, consisting of the crystal and two load capacitors. When the control voltage is applied to the crystal, it causes a change in the frequency of the oscillation, varying the frequency up and down depending on the voltage magnitude. The crystal, load capacitors, and control voltage are all connected to an amplifier/mixed circuit, where the control voltage is compared to a reference voltage to create an error signal. This error signal is used to adjust the frequency of the oscillator to the desired value. The oscillation frequency is also affected by the temperature of the environment, which is why temperature compensation is an important factor in VCXOs.

Conclusion

The SIT8208AC-32-18E-31.250000T is a versatile voltage-controlled crystal oscillator, suitable for use in a variety of different applications, such as telecommunications, medical equipment, Bluetooth devices, watches, and other portable electronic devices. Its working principle is based on a parallel-resonant crystal vibrator circuit, with a control voltage that determines the frequency of the oscillator. Temperature compensation is also used to ensure that the frequency of the oscillator remains stable over a wide range of temperatures.

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